Climate
New ‘Tension Buoy’ innovation could help expand floating solar and hydro power in Wales
A NEW Norwegian innovation could open the door for floating solar and hydro power projects across Wales, including the Celtic Sea and inland reservoirs.
The “Tension Buoy”, developed by renewable technology company Fred. Olsen 1848, is designed to maintain stable mooring for floating solar platforms even when water levels rise or fall dramatically. The system automatically adjusts its tension using a built-in winch, solving one of the biggest technical challenges for floating solar installations on dams and reservoirs.
Floating solar – panels mounted on buoyant platforms – is increasingly seen as a key partner to hydropower, allowing energy to be generated from the same water body without additional land use. When paired with hydropower dams, solar power can boost generation during dry periods or daylight hours, while hydro continues to supply baseload energy.
According to Fred. Olsen 1848, this combination could unlock hundreds of gigawatts of renewable potential worldwide. The company’s new Tension Buoy adapts automatically to fluctuating water levels, maintaining optimal tension without manual intervention and keeping floating solar arrays stable and secure.
Although the system was first deployed at Risør in Norway, the technology could soon have applications closer to home. With Pembrokeshire’s growing hydrogen and floating wind sector, experts say innovations like this could complement the region’s renewable mix.
Marine Energy Wales and ORE Catapult have both highlighted the need for flexible mooring and hybrid energy systems to make best use of the Celtic Sea’s renewable potential. Floating solar, combined with hydropower or battery storage, could form part of future local energy hubs alongside the projects already being developed in Milford Haven.
Fred. Olsen 1848 says its goal is to make sustainable energy “more widely available to help combat climate change”, continuing a 175-year tradition of maritime innovation.
The company’s commercial manager, Martinius Hars, said the Tension Buoy “removes one of the main barriers to large-scale floating solar deployment” by offering a simple, reliable solution to water-level variation.
If adopted in Wales, such systems could help reservoirs, ports and hydro dams contribute to the UK’s Net Zero target while creating new opportunities for the local supply chain in marine renewables.
Business
Pembroke Power Station National Grid shutdown power plans
A CALL to site specialist diesel generators at Pembroke Power Station to help keep the lights on in the event of a National Grid shutdown has been lodged with county planners.
In a screening application to Pembrokeshire County Council, RWE Generation UK PLC, through Ove Arup & Partners Ltd, wants to site up to six containerised diesel generators, diesel storage tank(s) and electrical connections at Pembroke Power Station, Pwllcrochan, near Pembroke.
The application site is within the site of the existing Pembroke Power Station, a combined-cycle gas turbine (CCGT) station which began commercial operation in September 2012, with a gross consented capacity of about 2,199 megawatts electric (MWe), replacing the previous oil-fired power station which operated for almost 30 years and was decommissioned in 1999.
A supporting statement says, subject to confirmation, it is considered to comprise permitted development, the scheme “a standalone plant, with its own fuel supply, capable of starting up, operating and shutting down independently from the power station”.
It adds: “It is required only in an emergency to maintain plant status and keep the power station operationally ‘ready’ in the event of a total or partial shutdown of the National Grid system. It is not required for the normal operation of the power station and does not extend its capacity, which remains as already consented, therefore it is not considered a change or extension.”

On need, it says it is mandatory that all electricity generators of over a megawatt have to adopt a new minimum standard of asset resilience; power stations “must be capable of restoring demand on the National Grid electricity transmission system in the event of a total or partial shutdown of the National Grid system”.
“The Power Station does not currently meet this new asset resilience standard, therefore new back-up power, control philosophy and on-site services that support site critical systems enabling the power station to remain ready to operate must be implemented.
“RWE is required to install a new enhanced emergency site auxiliary solution (diesel generators and diesel storage tanks) at the power station for resilience against the failure of the interconnected electricity distribution network into which it is normally connected in order to satisfy the Grid Code requirements by the mandated implementation deadline of December 31, 2026.
“RWE will make operational and fuelling provision, within its new resilience design at Pembroke power station of up to 120 hours, in order to provide capability to a slightly enhanced standard known to be valued by the National Energy System Operator (‘NESO’) in certain emergency network scenarios.”
It says construction is hoped to start in July 2026, lasting approximately nine to 12 months, the main part across the summer months.
The call will be considered by county planners at a later date.
Business
Pembrokeshire St Brides Castle biomass and solar scheme
PLANS for a green energy scheme at a Pembrokeshire former country house which is now holiday apartments have been given the go-ahead.
In an application to Pembrokeshire Coast National Park, HPB Ltd, through agent Acanthus Holden Architects, sought permission for a biomass boiler plant and installation of 16 rows of solar panels to the south of the tennis courts, St Brides Castle, St Brides, along with the removal of two tennis courts, two polytunnels, two sheds and relocation of a container.
Marloes and St Brides Community Council: Supporting
An officer report recommending approval said: “St Brides Castle. Listed Grade II* is a former country house (now holiday apartments) just south-west of the small settlement of St Brides.
“The house and its listed ancillary buildings stand prominently within a large grade-II-registered park and garden. The development site lies immediately south of the registered asset, outside of its boundary.”
It added: “Although in a sensitive location, the proposed scheme is well-screened, utilising an existing hedged enclosure. The proposed panels do not protrude over the hedge line, the proposed extra planting to the south and west providing further screening. The proposed building, also well-screened, is of traditional design, proportions and materials.”
The application was conditionally approved by park planners.
Climate
Climate campaigners call for action ahead of Senedd election
NEW polling suggests voters in Wales want stronger action on climate change, nature recovery, clean energy and pollution ahead of next month’s Senedd election.
Climate Cymru, a coalition of organisations, communities and campaigners, said the findings showed public concern remained high as Wales prepares to go to the polls on Thursday, May 7.
The polling, highlighted by Climate Cymru partners including Friends of the Earth Cymru, WWF Cymru and RSPB Cymru, found that six in ten people in Wales said they were worried about climate change.
Concern was even higher among younger people, with 78 per cent of 16 to 29-year-olds saying they were worried.
The research also pointed to growing concern about the impact of climate change on daily life, including extreme weather, food insecurity, poverty and the wider economic consequences for communities across Wales.
Climate Cymru said the findings showed strong support for practical measures including warmer homes, home energy efficiency schemes, community-led renewable energy, and the expansion of solar and wind power.
The Friends of the Earth Cymru polling found that 81 per cent supported funding for home energy efficiency, 75 per cent backed community-led renewable energy, 83 per cent supported solar power, 72 per cent supported offshore wind, and 65 per cent supported onshore wind.
Nature recovery was also highlighted as a major public priority.
RSPB Cymru polling found that 74 per cent of people in Wales supported legal targets for nature recovery, while 76 per cent wanted governments to do more to tackle nature loss. A further 77 per cent said they wanted to see more wildlife thriving in local green spaces.
WWF polling found strong support for action on water pollution, with 87 per cent backing measures to tackle river pollution, 81 per cent supporting a target to halve freshwater pollution by 2030, and 79 per cent supporting the restoration of seagrass, saltmarsh and oyster reefs.
Climate Cymru said Wales had seen a 20 per cent decline in wildlife since 1994, with one in six species threatened with extinction nationally.
A Climate Cymru spokesperson said: “The message from the public is clear: people want political leaders to match the scale of the climate and nature crises with bold, practical policies that improve everyday life.”
The coalition is calling on all parties contesting the Senedd election to commit to clean energy, warmer homes, stronger legal protections for nature, urgent action on river pollution, and support for nature-friendly farming.
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